# CVE-2022-51016

## Summary

- **CVE ID:** CVE-2022-51016
- **Severity:** MEDIUM
- **CVSS Score:** 6.1 (CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N)
- **CWE:** CWE-294
- **Published:** Sep 7, 2026
- **Last Modified:** Sep 8, 2026

## Description

PocketMine-MP 3.x (before 3.27.0) does not implement Minecraft Bedrock protocol encryption, so the server cannot verify that a connecting client possesses the private key corresponding to its login token. An attacker who captures a valid login from another player's session (for example by tricking the player into connecting to an attacker-controlled server) can replay that login to impersonate the victim and pass XBOX Live authentication until the JWT token expires (typically 2-3 days). This affects servers directly reachable over the internet that are not behind a proxy with encryption enabled. Fixed in 4.0.0 and backported to 3.27.0.

## Affected Products

- pmmp — PocketMine-MP (3.0.0)
- pmmp — PocketMine-MP (3.27.0)

## References

- [CNA](https://github.com/pmmp/PocketMine-MP/security/advisories/GHSA-h79x-98r2-g6qc)
- [CNA](https://github.com/pmmp/PocketMine-MP/commit/d28be4eaf24a890f7ef110a51181a3d806a6acca)
- [CNA](https://www.vulncheck.com/advisories/pocketmine-mp-before-4.0.0-authentication-bypass-via-login-replay)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.23%
- **EPSS Percentile:** 13.2

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-09._